Water may leak into the transmission from the dipstick tube, causing fluid contamination and a shudder during light acceleration. New seals for the dipstick tube are available; the transmission fluid should be flushed as well. If the problem lingers, a new torque converter may be needed.

A whine type noise may develop form the engine area when the car is idling (typically in warmer temperatures, after the engine has warmed up). It's possible that the noise may be from the engine oil system and is harmless. Still, have a technician verify that the noise is nothing to worry about.